网上世界既精彩又危险,黑客到处有,轻者使计算机中毒瘫痪,重者惹来很多麻烦。为此,上网前应做好安全保护措施,才能有备无患。一、安装防火墙。防火墙是计算机内部和网络的一道安全门,所有进入计算机的数据必须经过防火墙检查才能通过。现在的杀毒软件大多提供了防火墙技术,当有病毒企图进入计算机系统内时,防火墙能立即检测到并发出警告或将其 The online world is both exciting and dangerous. There are hackers everywhere. Light ones have paralyzed computer poisonings and caused heavy trouble in serious cases. To this end, the Internet should be well before the security measures to be prepared. First, install a firewall. Firewall is a security gate inside the computer and the network, all the data into the computer must go through a firewall check to pass. Most antivirus software now provides firewall technology that can detect and alert a firewall immediately when a virus attempts to enter a computer system